Willie is correct if! The answer to your question depends on how you define and use the word Christian. Christian is a much slandered word in the World today. The Church across the world is filled with unbelievers claiming the name of the Christ for their own because the Churches are filled with ear ticklers. Ear tickling preachers are not the men of God but are the men of god, the god of the air, stone, wood, trees and so on. They preach a soft gospel that is not founded on the whole Bible but on parts of the New Testament.
The best and most common example of this twisting parts of scripture "Judge not lest you be judged." This, single, verse is not the key verse of that chapter and sadly, it is not the key verse of the first five verses, the opening paragraph. The key verse of this selection of scripture is the last verse, verse five. In the last verse of the paragraph is the instruction for how to understand and how to apply these verse to your life.
So, what truth is the old man from down south talking about that these ear Ticklers do not teach? There is enough to explain in that question that it could fill the Bible from the first passage, all the way through the very last Amen of The Revelation of Jesus, the Christ... Oh WAIT... it did! So t is a real Christian? There is much discussion on this matter and if I were God they would be defined my way... alas, I'm not and the definition lies in d's Word, the Bible. There, certainly, is no cookie cutter for Christians meaning we come in all shades of color, styles of life, and driving everything from our best bicycyle to a Rolls to go to Church and we worship in every style of Worship from the excited, jumping up and down style of some African Bush Tribes to bored, Baptized in Pickle Juice, full immersion, Baptist and their stern faced, unmoving praise to God.
There is one thing we, every one of the Saved, have in common, we have given out souls over to Jesus, God in the flesh of a man and when we do that He is faithful to His Word and sends the Holy Ghost, Holy spirit or what ever name of reverence we prefer to call Him by. The key here is found in the New testament, two spirits, one evil and one Holy, cannot reside in the same place or, in this case, the same body.
Getting rid of an evil spirit does not require a Pastor, it can be done right here in front of your computer screen. If, and please remember I said if, you are indwelt with any demon or demons, the Holy Spirit is not be influenched by you, he is not in you. If you, truly, fall on your face and surrender to the indwelling control of God, the Holy Spirit will do what you and what no Pastor or Priest can do without His help... he will move in, Indwell, and kick the minion or minions of Satan into Hell where they belong.
Praying for you and may God draw you to be a member the Bride of the Christ.